If your navigation does not accurately follow you, (a street or two off/not aligned properly) please follow these tips:

•Check the VSS plug which is the brown plug with the green wire.

 This may not be getting a good connection. 

•Check that the GPS antenna is not covered by any metal. 

 You can put the antenna on the dash temporarily and drive around a little to prompt the unit to update to your location, then relocate it just below the dash. 

If you are still having issues please feel free to reach out to the support department for additional assistance.